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Numerical Investigation of NOx Emission Reduction in Non-Premixed Lean Reverse-Flow Combustor in a Micro Gas Turbine Engine
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Engineering Cluster, Singapore, 138683, Singapore.
Engineering Cluster, Singapore, 138683, Singapore.
Interdisciplinary Division of Aeronautical and Aviation Engineering, Hong Kong. Polytechnic University, Hung Hom, Hong Kong.
2020 (English)In: Emission Control Science and Technology, ISSN 2199-3629Article in journal (Refereed) Epub ahead of print
Abstract [en]

This paper details a NOx emissions characteristics study of a reverse-flow combustor using the steady Reynolds averaged Navier-Stokes (RANS) methodology. The combustor considered in this paper is the SR-30 engine model. The aim of this work is to understand the pollutant formation characteristics within the combustor chamber volume across various combustor zones. Effective ways to counter such high emissions by means of flow dilution were also investigated in the present study. Results indicated that the baseline reverse-low combustor model showed high NOx emission characteristics in the primary and secondary zones due to uneven temperature distribution. The emissions can be reduced effectively with additional dilution holes at the dilution zone of the reverse-flow combustor. The flow split due to the newly designed holes caused the velocity components (axial, radial and tangential), turbulence kinetic energy and the temperature within the primary and secondary zone to reduce significantly. The recovery of flow in the dilution zone with further reduction in temperature reduced the overall NOx emission significantly.

Place, publisher, year, edition, pages
Springer, 2020.
Keywords [en]
NOx emissions, Computational fluid dynamics, Micro gas turbine engine, Reverse-flow combustor, Dilution hole, Temperature reduction
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-78870DOI: 10.1007/s40825-020-00157-zScopus ID: 2-s2.0-85079691047OAI: oai:DiVA.org:ltu-78870DiVA, id: diva2:1429894
Available from: 2020-05-13 Created: 2020-05-13 Last updated: 2020-05-13

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Joy, Jesline

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CiteExportLink to record
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